Open Source Repository

/*********************************************************************** Copyright (C) 2007 Andrew Khan** This library is free software; you can redistribute it and/or* modify it under the terms of the GNU Lesser General Public* License as published by the Free Software Foundation; either* version 2.1 of the License, or (at your option) any later version.** This library is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU* Lesser General Public License for more details.** You should have received a copy of the GNU Lesser General Public* License along with this library; if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA***************************************************************************/package jxl.write.biff;import java.io.OutputStream;import java.io.IOException;import jxl.common.Logger;/*** Used to generate the excel biff data in memory. This class wraps a byte* array*/class MemoryDataOutput implements ExcelDataOutput{// The loggerprivate static Logger logger = Logger.getLogger(MemoryDataOutput.class);/*** The excel data*/private byte[] data;/*** The grow size for the array*/private int growSize;/*** The current position within the array*/private int pos;/*** Constructor*/public MemoryDataOutput(int initialSize, int gs){data = new byte[initialSize];growSize = gs;pos = 0;}/*** Writes the bytes to the end of the array, growing the array* as needs dictate** @param d the data to write to the end of the array*/public void write(byte[] bytes){while (pos + bytes.length > data.length){// Grow the arraybyte[] newdata = new byte[data.length + growSize];System.arraycopy(data, 0, newdata, 0, pos);data = newdata;}System.arraycopy(bytes, 0, data, pos, bytes.length);pos += bytes.length;}/*** Gets the current position within the file** @return the position within the file*/public int getPosition(){return pos;}/*** Sets the data at the specified position to the contents of the array* * @param pos the position to alter* @param newdata the data to modify*/public void setData(byte[] newdata, int pos){System.arraycopy(newdata, 0, data, pos, newdata.length);}/** * Writes the data to the output stream*/public void writeData(OutputStream out) throws IOException{out.write(data, 0, pos);}/*** Called when the final compound file has been written. No cleanup is* necessary for in-memory file generation*/public void close() throws IOException{}}